Hi - I don't quite get these dropouts... what is the point of the cutouts on the tabs? How should they be attached... i.e. how far in should they go? To complicate things the tabs are tapered. Should I cut a v shaped slot to fit? Would really appreciate your thoughts!
i bet they're for domed stays perhaps?
See this blog for pictures. Once v-slotted you hammer the chainstay ends over the dropout so you wouldn't have to fill it with much brass at all for a solid connection.
Just a theory...